Fixing command to update gcc that is present in pywincalc actions to …

…attempt to get build behavior to match.

.github/workflows/build.yml

@@ -77,7 +77,7 @@ jobs:
           platforms: all
 
       - name: Upgrade gcc
-        run:  yum install -y gcc gcc-c++
+        run:  sudo apt-get install -y gcc g++
 
       - name: Configure CMake
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.